using System;

class ExchangeTwoVariables
{
    static void Main()
    {
		//Declare  two integer variables and assign them with 5 and 10 and after that exchange their values.
		int first = 0;
		int second = 0;
		first = 5;
		second = 10;
		Console.WriteLine("1. ="+first);
		Console.WriteLine("2. ="+second);
		first = first^second;
		second = first^second;
		first = first^second;
		Console.WriteLine();
		Console.WriteLine("1. ="+first);
		Console.WriteLine("2. ="+second);
    }
}
